Join Scott Gardner for an in-depth discussion in this video Index into strings, part of Swift 3 Essential Training: Beyond the Basics.
- [Instructor] In the basics course,…I explain that a string is a collection of characters,…and a character is a grapheme cluster…of one or more Unicode scalar values…that combine to form a single, human-readable character.…That's certainly a mouthful,…and if you're not yet familiar with these concepts,…refer back to the characters and strings chapter…in the basics course for details.…I'm starting out with two strings.…Both are of a circled letter A with an acute accent.…String two uses a single Unicode scalar…for an A with acute accent,…and string one uses separate Unicodes…for the letter A and the accent,…yet these strings are equal.…
They have the same character count…but different endIndex values.…I want to point out that string indexes…are not regular integers,…but they are instances of String.Index.…I'll command click into endIndex…and see that it is of type String.Index.…And index is a type alias to String.CharacterView.Index.…
And CharacterView is a view of a string's contents…as a collection of characters.…
- Adding source files, resources, links, and literals
- Adding pages to a playground
- Using overflow operators and bitwise operators
- Using ranges with strings
- Creating complex sequences
- Chaining higher-order functions
- Defining lazy properties
- Using failable initializers
- Mutating methods
- Working with singletons
- Nesting function types
- Creating error types and recursive enumerations
- Extending concrete types
- Referencing selectors and key paths
- Working with protocol-oriented programming
- Defining class-only protocols and optional protocols
- Using option sets, type checking, and casting operators
Skill Level Intermediate
Core Data for iOS and macOS Enterprise Developerswith Jon Bott1h 46m Intermediate
Distributing Your iOS App for Testing with TestFlightwith Ron Buencamino35m 10s Intermediate
iOS App Development: Test-Driven Developmentwith Harrison Ferrone2h 14m Intermediate
3. Strings and Characters
4. Sequences and Collections
5. Control Flow
6. Value and Reference Types
9. Access Control
Understand access control3m 47s
Next steps1m 2s
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